Patent US2628112A successfully refreshed from Google Patents.
US2628112A
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Self-aligned lubricating stuffing box
Assignee: Phillips Petroleum Co
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Filing: 1949-11-14
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Granted: 1953-02-10
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Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Glen G Hebard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:13
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/187; E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; F16J15/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR322403A
Cited
US774270A
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GB192288A
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US1529874A
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US1712868A
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US1902360A
Cited
US2235289A
Cited
US2180880A
Cited
US2210826A
Cited
US2267183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |